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鞍山地区3.0Ga铁架山花岗岩是华北克拉通时代最古老、分布范围最大的钾质花岗岩,其中存在较多成熟度高的变泥沙质岩石表壳岩,其元素和Nd同位素组成与铁架山花岗岩十分相似。以往研究把它们作为铁架山花岗岩中的表壳岩包体,认为铁架山花岗岩形成于它们的部分熔融。本文利用碎屑锆石SHRI MP U-Pb定年方法对鞍山铁架山花岗岩中变泥沙质表壳岩的形成时代进行了制约,证实表壳岩形成于铁架山花岗岩之后,为遭受强烈变质变形地区变泥沙质岩石时代研究提供了一个新的实例。
The 3.0 Ga Tiejishan granite in Anshan area is the oldest and most widely distributed potassic granite in the North China Craton period, in which there are more matured rocks of variable matte rock with elemental and Nd isotope composition and iron frame Mountain granite is very similar. In the past, they were regarded as the crustal rocks in the Tiegoushan granite, and they were considered to be partially melted in the granitic rocks of the Tiegoushan. In this paper, we use the SHRI MP U-Pb dating of detrital zircons to constrain the formation age of the altered silty forested rocks of the Tieshanshan granite in Anshan. It is confirmed that the formation of the crust rocks is strongly metamorphosed Deformation area becomes silt rock age research provides a new example.